Coordinators:
John Cant
Mars Muusse
Index ORG
ring projects
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1cy June
1cy July
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1cy Nov
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2cy Jan
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2cy Aug
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adult Jan
adult Feb
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adult April
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Heermann's Gull heermannii 1st cycle (2CY), January 20 2014, San Fransisco, California USA. Picture: Amar Ayyash.
1st cycle Heermann's Gull chase a Common Raven and aggressively harass it in flight, much like jaegers do with gulls and terns.
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Heermann's Gull heermannii